/* ==========================================================================
   components.css — 全站组件
   主题：WANG TANGHUA
   规则：直角、细线、金色只做点缀；标题 Georgia 400；eyebrow 位于标题之下。
   ========================================================================== */

/* ---------------------------------------------------------------- 文字 */

.eyebrow {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-gold-700);
  margin-top: var(--space-4);
}

.eyebrow--light {
  color: var(--color-gold-200);
}

.section-head {
  max-width: 720px;
}

.section-head__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-3xl);
  font-weight: var(--fw-regular);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: var(--color-text);
}

.section-head__title em {
  font-style: italic;
  color: var(--color-gold-700);
}

.section--dark .section-head__title,
.section--dark .section-head__title em {
  color: var(--color-text-inverse);
}

.section-head__desc {
  margin: var(--space-5) 0 0;
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  max-width: 62ch;
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.section-head--center .section-head__desc {
  margin-inline: auto;
}

.lead {
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  line-height: 1.65;
  color: var(--color-text);
}

.prose p {
  margin: 0 0 var(--space-5);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  max-width: 68ch;
}

.prose p:last-child { margin-bottom: 0; }

.prose strong { color: var(--color-text); font-weight: var(--fw-medium); }

.prose--lead p:first-of-type {
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  line-height: 1.65;
  color: var(--color-text);
}

/* ---------------------------------------------------------------- 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 15px 30px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.btn--primary {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-on-brand);
}

.btn--primary:hover {
  background: var(--color-brand-hover);
  border-color: var(--color-brand-hover);
}

.btn--dark {
  background: var(--color-primary-900);
  border-color: var(--color-primary-900);
  color: var(--color-text-inverse);
}

.btn--dark:hover {
  background: var(--color-primary-700);
  border-color: var(--color-primary-700);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.btn--outline:hover {
  border-color: var(--color-primary-800);
  background: var(--color-primary-800);
  color: var(--color-text-inverse);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.42);
  color: var(--color-text-inverse);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
}

.btn--text {
  padding: 0;
  border: 0;
  background: none;
  color: var(--color-text);
  text-transform: none;
  letter-spacing: var(--ls-normal);
  font-size: var(--fs-base);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--color-border-strong);
}

.btn--text:hover { text-decoration-color: var(--color-brand); }

.btn--sm { padding: 11px 20px; font-size: var(--fs-xs); }
.btn--lg { padding: 18px 38px; }
.btn--block { display: flex; width: 100%; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.link-arrow svg {
  transition: transform var(--duration-base) var(--ease-out);
}

.link-arrow:hover { color: var(--color-gold-700); }
.link-arrow:hover svg { transform: translateX(3px); }

/* ---------------------------------------------------------------- 页头 */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}

.brand__name {
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  margin-left: auto;
}

.nav__link {
  position: relative;
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding-block: 6px;
  transition: color var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--color-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) var(--ease-out);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  transform: scaleX(1);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

.header-phone {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  color: var(--color-text-secondary);
  text-decoration: none;
  white-space: nowrap;
}

.header-phone:hover { color: var(--color-text); }
.header-phone svg { width: 15px; height: 15px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--color-text);
  margin-inline: auto;
  transition: transform var(--duration-base) var(--ease-out),
    opacity var(--duration-fast) var(--ease-out);
}

/* 抽屉 */

.drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  visibility: hidden;
}

.drawer.is-open { visibility: visible; }

.drawer__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(29, 29, 27, 0.42);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}

.drawer.is-open .drawer__backdrop { opacity: 1; }

.drawer__panel {
  position: absolute;
  top: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  width: min(380px, 88vw);
  height: 100%;
  padding: var(--space-6);
  background: var(--color-bg);
  transform: translateX(100%);
  transition: transform var(--duration-base) var(--ease-out);
  overflow-y: auto;
}

.drawer.is-open .drawer__panel { transform: none; }

.drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.drawer__close {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 0;
  background: none;
  cursor: pointer;
  color: var(--color-text);
}

.drawer__nav {
  display: flex;
  flex-direction: column;
  padding-block: var(--space-4);
}

.drawer__nav-link {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--fs-md);
  color: var(--color-text);
  text-decoration: none;
}

.drawer__nav-link.is-active { color: var(--color-gold-700); }

.drawer__foot {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-6);
}

/* ---------------------------------------------------------------- 页脚 */

.site-footer {
  background: var(--color-primary-900);
  color: var(--color-text-inverse-dim);
  padding-block: var(--space-20) var(--space-8);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-10);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-brand__name {
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-inverse);
  margin-bottom: var(--space-4);
}

.footer-brand__desc {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  margin: 0 0 var(--space-6);
  max-width: 34ch;
}

.footer-brand__contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--fs-base);
}

.footer-brand__contact a,
.footer-brand__contact span {
  color: var(--color-text-inverse-dim);
  text-decoration: none;
}

.footer-brand__contact a:hover { color: var(--color-gold-300); }

.footer-brand__phone {
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  color: var(--color-text-inverse) !important;
  letter-spacing: 0.04em;
}

.footer-col__title {
  margin: 0 0 var(--space-4);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-text-inverse);
}

.footer-col__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: var(--fs-base);
}

.footer-col__list a {
  color: var(--color-text-inverse-dim);
  text-decoration: none;
}

.footer-col__list a:hover { color: var(--color-gold-300); }

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: var(--space-6);
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.45);
}

/* ---------------------------------------------------------------- 资历条 */

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stat-strip__item {
  padding: var(--space-8) var(--space-6);
  border-right: 1px solid var(--color-border);
}

.stat-strip__item:last-child { border-right: 0; }

.stat-strip__value {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--fs-2xl);
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.stat-strip__label {
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

/* ---------------------------------------------------------------- 方法卡 */

.method-card {
  display: flex;
  flex-direction: column;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-text);
}

.method-card__index {
  font-family: var(--font-serif);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wider);
  color: var(--color-gold-700);
  margin-bottom: var(--space-6);
}

.method-card__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  font-weight: var(--fw-regular);
  line-height: 1.3;
  color: var(--color-text);
}

.method-card__text {
  margin: 0 0 var(--space-5);
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
}

.method-card__note {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-xs);
  line-height: 1.65;
  color: var(--color-text-tertiary);
}

/* ---------------------------------------------------------------- 案例卡 */

/* 分类筛选：三枚方钮，选中反白 */
.filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.filter__btn {
  padding: 11px 20px;
  border: 1px solid var(--color-border-strong);
  border-radius: 0;
  background: transparent;
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.filter__btn:hover {
  border-color: var(--color-primary-800);
  color: var(--color-text);
}

.filter__btn.is-active {
  background: var(--color-primary-900);
  border-color: var(--color-primary-900);
  color: var(--color-text-inverse);
}

.filter__btn:focus-visible {
  outline: 2px solid var(--color-gold-600);
  outline-offset: 2px;
}


.result-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.result-card__media {
  position: relative;
  overflow: hidden;
  background: var(--color-neutral-100);
  aspect-ratio: 3 / 4;
}

.result-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.result-card:hover .result-card__media img { transform: scale(1.03); }

.result-card__play {
  position: absolute;
  left: var(--space-3);
  bottom: var(--space-3);
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.85);
  background: rgba(29, 29, 27, 0.42);
  backdrop-filter: blur(2px);
  color: #fff;
  transition: background-color var(--duration-fast) var(--ease-out);
}

.result-card:hover .result-card__play { background: rgba(29, 29, 27, 0.55); }

.result-card__tag {
  position: absolute;
  left: 0;
  top: 0;
  padding: 7px 12px;
  background: rgba(29, 29, 27, 0.82);
  color: #fff;
  font-size: 10px;
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}

.result-card__body {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-4);
}

.result-card__title {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  line-height: 1.45;
  color: var(--color-text);
}

.result-card__meta {
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  color: var(--color-text-tertiary);
}

.result-card[hidden] { display: none; }

/* ---------------------------------------------------------------- 手风琴 */

.accordion {
  border-top: 1px solid var(--color-border);
}

.accordion__item {
  border-bottom: 1px solid var(--color-border);
}

.accordion__btn {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-6);
  width: 100%;
  padding: var(--space-6) 0;
  border: 0;
  background: none;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  line-height: 1.5;
  color: var(--color-text);
}

.accordion__icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  position: relative;
}

.accordion__icon::before,
.accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--color-text-secondary);
  transition: transform var(--duration-base) var(--ease-out),
    opacity var(--duration-fast) var(--ease-out);
}

.accordion__icon::before {
  left: 0;
  top: 50%;
  width: 100%;
  height: 1px;
}

.accordion__icon::after {
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
}

.accordion__item.is-open .accordion__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--duration-base) var(--ease-out);
}

.accordion__item.is-open .accordion__panel {
  grid-template-rows: 1fr;
}

.accordion__inner {
  overflow: hidden;
}

.accordion__content {
  padding: 0 var(--space-10) var(--space-6) 0;
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
}

.accordion__content p { margin: 0 0 var(--space-3); }
.accordion__content p:last-child { margin-bottom: 0; }

/* ---------------------------------------------------------------- 流程 */

.process {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-6);
}

.process__step {
  position: relative;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-text);
}

.process__title {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--color-text);
}

.process__text {
  margin: 0;
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ---------------------------------------------------------------- 灯箱 */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: grid;
  place-items: center;
  padding: var(--space-8);
  background: rgba(16, 15, 14, 0.96);
  visibility: hidden;
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}

.lightbox.is-open {
  visibility: visible;
  opacity: 1;
}

.lightbox__stage {
  position: relative;
  /* 必须给显式 width：grid 居中 + 子元素 width:100% 会让舞台塌成 0 宽，视频就"打不开" */
  width: min(560px, 100%);
  max-height: 82vh;
}

.lightbox__video {
  display: block;
  width: 100%;
  height: auto;
  max-height: 82vh;
  background: #000;
}

.lightbox__caption {
  margin-top: var(--space-4);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
}

.lightbox__close {
  position: absolute;
  top: -46px;
  right: 0;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: none;
  color: #fff;
  cursor: pointer;
}

.lightbox__close:hover { background: rgba(255, 255, 255, 0.12); }

/* ---------------------------------------------------------------- 表单 */

.form {
  display: grid;
  gap: var(--space-5);
}

.form__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.field__label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.field__input,
.field__textarea,
.field__select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border-strong);
  border-radius: 0;
  background: var(--color-bg);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  color: var(--color-text);
  transition: border-color var(--duration-fast) var(--ease-out);
}

.field__input:focus,
.field__textarea:focus,
.field__select:focus {
  outline: none;
  border-color: var(--color-primary-700);
}

.field__textarea { min-height: 128px; resize: vertical; }

.field--wide { grid-column: 1 / -1; }

/* ---------------------------------------------------------------- CTA 带 */

.cta-band {
  background: var(--color-primary-900);
  color: var(--color-text-inverse);
  padding-block: var(--space-20);
}

.cta-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-10);
}

.cta-band__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-serif);
  font-size: var(--fs-3xl);
  font-weight: var(--fw-regular);
  line-height: 1.25;
  color: var(--color-text-inverse);
}

.cta-band__title em {
  font-style: italic;
  color: var(--color-gold-300);
}

.cta-band__desc {
  margin: 0;
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: rgba(255, 255, 255, 0.66);
  max-width: 52ch;
}

.cta-band__actions {
  display: flex;
  gap: var(--space-3);
  flex-shrink: 0;
  flex-wrap: wrap;
}

/* ---------------------------------------------------------------- 杂项 */

.back-to-top {
  position: fixed;
  right: var(--space-6);
  bottom: var(--space-6);
  z-index: var(--z-sticky);
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-base) var(--ease-out),
    visibility var(--duration-base) var(--ease-out);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  color: var(--color-text-tertiary);
}

.breadcrumb a {
  color: var(--color-text-tertiary);
  text-decoration: none;
}

.breadcrumb a:hover { color: var(--color-text); }

.breadcrumb span { color: var(--color-border-strong); }

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 1180px) {
  .nav { gap: var(--space-6); }
}

@media (max-width: 1024px) {
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .header-phone { display: none; }
  .site-header__actions .btn--dark { display: none; }

  .facemap {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-10);
  }

  .process { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .stat-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat-strip__item:nth-child(2) { border-right: 0; }
  .stat-strip__item:nth-child(-n + 2) { border-bottom: 1px solid var(--color-border); }

  .cta-band__inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 768px) {
  .process { grid-template-columns: minmax(0, 1fr); }
  .site-footer__top { grid-template-columns: minmax(0, 1fr); }
  .form__row { grid-template-columns: minmax(0, 1fr); }
  .site-footer__bottom { flex-direction: column; }
  .accordion__content { padding-right: 0; }
}

/* ==========================================================================
   首页透明页头（压在全屏视频上）
   ========================================================================== */

.page-home .site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: transparent;
  backdrop-filter: none;
  border-bottom-color: transparent;
  transition: background-color var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out);
}

.page-home .site-header:not(.is-scrolled) .brand,
.page-home .site-header:not(.is-scrolled) .brand__name { color: #fff; }

.page-home .site-header:not(.is-scrolled) .nav__link { color: rgba(255, 255, 255, 0.78); }
.page-home .site-header:not(.is-scrolled) .nav__link:hover,
.page-home .site-header:not(.is-scrolled) .nav__link.is-active { color: #fff; }

.page-home .site-header:not(.is-scrolled) .header-phone { color: rgba(255, 255, 255, 0.82); }

.page-home .site-header:not(.is-scrolled) .btn--dark {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-on-brand);
}

.page-home .site-header:not(.is-scrolled) .nav-toggle__bar { background: #fff; }

.page-home .site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--color-border);
}

/* ---------------------------------------------------------------- 图片灯箱 */

.lightbox--photo {
  padding: var(--space-6);
}

.photo-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  margin: 0;
}

.photo-stage img {
  display: block;
  width: auto;
  height: auto;
  max-width: min(920px, 92vw);
  max-height: 84vh;
  background: var(--color-primary-900);
}

.photo-stage__caption {
  font-size: var(--fs-xs);
  letter-spacing: var(--ls-wide);
  color: rgba(255, 255, 255, 0.65);
  text-align: center;
}

.lightbox__close--float {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
}